Tire.



v. E. VAN CANTFOR'T.

TIRE.

APPLICATION FILED APR.18,1908.

Patented Sept. 21, 1909.

UNITED STATES PATENT OFFICE.

- I VICTOR EUGENE VAN CANTFOR'I', bF AKRON. OHIO.

' Application filed April 18. 1908.

Serial No. 427.510.

T 0 all u'ltom. it may concern.

The object of this invention primarily is v to construct the outer casing of a doubletube pneumatic tire with a tread portion provi ed with means desi'rned especially to prevent skidding and wear and incidentally to render the same as nearly puncture-proof accordaiu'e with this invention.

transve se sectional view of the tread por- 1' tion of a tire detached. preparatory to mounting on the body of the tire casing.

Fig. 3 is a plan of a nut used in onnec ion with the bolts for preventing skidding. Fig. 4- lb" a sectional view of Fig. 3 on line X.

as possible.

. In carryuug into effect the foregoing objeet this invention contemplates providing: the tread portion of the casing with'a eoveri ing of leather or equivalent wear-resisting flexible and semi-elastic material through which and a portion of the tire casing oxtend a plurality ot'bolts having threaded shanks projecting outwardly through the covering hearing nuts. preferably circular in contour constituting jH'OJCCliOHS or protuberanees on the tread of the ti e to prevent skidding. secure increased traction, decrease the. wear and prevent injury and puncture. to the tire.

Other advantages constituting objects of I this invention will more fully appear in the suh mned d scription.

pr ctical embodiment of thi invention is illustrated in the accompanying drawings in which similar reference numerals indicate like parts in the different liglitt's.

1n the drawings: Figure l is. a view in transverse section f the tir casing of a double-tube. pneumatic tire t-mi trueted in Fig. 2 is a Fig. 5 is a view in side elevation of a bolt employed. and. Fig. is a sectional \lt-W en- 2 larged showing the means for locking the nut on the bolt.

Referring to the drawings, 2 represents .the out r tube or easing of a double-tube pneumatictire ceastruete l in the ordinary manner. provided with lateral l)C21Clllig$ i2, 2,

for engagement with the. iuturned edges of a rlencher rim. As far as. it eoiuerns this invention any eoustrtu-t'ion of tire casing may be empl y d and al desired form ot fastening device used which is preferred, this invention having relation primarily to the tread portion thereof.

Adapted to he mounted on and united with the casing 1 and form therewith a unitary article is a tread 3 usually manufactured separately from the tire casing and after placement thereon united thereto by vuleantzation; Secured to the outer surface of the tread 3 is a strip of flexible. wear-resisting, substantially non-elastie material 4t which if constructed of material which would be injared by the heat, necessary to vuleanize the rubber of the tire must necessarily be placed thereon after the curing of the tire tread 3 are a plurality of bolts 5 having preferably fiat: heads with small wings 7 and a threaded shank 8. The tread porti n of the shank 8 is provided with a flattened or grooved portion 9 for a purpose to he stated. Adapted to be mounted on the threaded portion of the shank S is a preferably flat circular nut 10 having a central threaded opening 11 united with which is a groove 12 extending through the threads in the nut. \Vhen the nut 10 is mounted on the shank S of the bolt 5 it is positioned so that: the groove 5 will register with the flattened or grooved portion 9 of the shank. and into the opening formed by the registration of these two is driven a key 13 which lot-ks unilcr the nut 10 when. in place. by reason of the fact that the inner end of the groove 5' in the shank of the bolt. 5 curves outwardly to meet the outer surface thereof. thus causing the point of the l cking key 1 to be bent outwardly as it encounters the same, as clearly shown in Fig. (3.

In constructing a tire embodying this inf vention the casing l and tread tare manut'aetured separately and a plurality of openings are formed in the central portion of the tread through which are pa sed the shank 9 of the bolts 5 leaving the head portions of the bolts on the inner face of the same and f the. outer threaded end projecting beyond i the outer periphery thereof. The tread is then placed upon the casing 1 and vulcan ized thereto which firmly unites them into i a unitary article with the shanks of the bolts projecting therefrom andthe heads thereof firmly embedded in the wall of the tire and secured against revolution by means of the wings 7. A strip of leather or analogous material having suitable o enings arranged to receive the extended en s of the bolts is 'then placed on the tread of the tire and pressed down sufliciently to cause the bolts to project therethrough. The nuts 10 are then screwed on the shanks of the bolts and secured by means of the 'lockin keys- 13 which effectually revents their urther rotation and holds t em against unintentional dis lacement.

n view of the nature of the material of which the tread 3 and covering 4 are comosed, the'nuts may be readily positioned to rin the grooves 12 thereof into registering relatlon with the grooves 9 of the bolts, being yieldable sufficiently to permit this resu t. The rotective covering 4 performs the two-fold function of not only protecting the tire against uncture but also protects the tread thereo from the wearing action of the nuts when moved by obstacles in the roadway. It will be apparent that if the protective covering 4.- were not employed, the tread 3 previous to its placement on the easing 1 might be laid upon an anvil to support the ends of the bolts and the shanks thereto upset or riveted over the nuts or plain washers employed in place of the nuts, then after the tread is placed on the casing it could be vulcanized, but the employment of the protective strip 4 prevents this method of applying the tread, for the reason that the heat necessary to vulcanize the rubber in the tire would absolutely ruin the strip 4 and hence it must be placed upon the tread after the bolts have been ositioned therein and the tire vulcanized. it is also further apparent that after vulcanization it is impossible to properly sustain the heads-of the bolts 5 sufficiently to permit of the upsetting or rivet- 1 ing of the metal of the bolts to secure the nuts or washers thereon, due to the existence of the soft body of the casing 1 under the heads of the bolts. From this it will be seen that it is necessary to secure the nuts 10 in position by means which will not require upsetting of the metal thereof and which can be done without disturbing the position thereof or loosening them in the tire body.

From the foregoing it will be seen that in order to provide a tire casing with bolts having heads embedded therein and with their nuts or washers on the outer surface of the tire and at the same time provide the of riveting, the nuts must besecured on the' bolts by some such means as a threaded en gagement between the two and they must also be prevented from unscrewing or becoming loosened by some means such as a locking key or its equivalent. It will be pointed out thatthe foregoing construction 'will provide a tire having a coverin on the tread thereof of leather or some suitable substance to resist wear, both from contact with the roadway and the wear incident to any slight movement of the bolts which are embedded in the tire casing and which serve to hold the nuts on the outer surface of the protective covering for preventing skidding of the tire. 4

Having thus described my invention, what I claim and desire to secure by Letteis Patcut, is 2-- A tire comprising a body portion and a. separate trea united thereto by vulcanization, said tread provided, previous to its vulcanization with a pluralit of bolts having threaded shanks positione in suitable a ertures therein, extending from the inner ace thereof outwardly and projecting therefrom, the heads of said bolts adapted to rest on the outer surface of the original tire body when said tread is united thereto, a stripof wears resisting material ositioned on the Outer surface of said trea after vulcanization constituting a protective covering therefor, nuts adapted to be secured on the threaded ends of said bolts to engage said protective covering, thereby maintaining the same in snug engagement with said tread and constituting protuberances for receivin the wear and preventing skiddin of sai tire and means extending longitudinally of said bolts for locking said nuts thereon, whereby said nuts are locked against rota tion irrespective of the wear thereon.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

VICTOR EUGENE VAN GANTFORT.

Witnesses:

C. E. HUMPHIBEY, GLENARA Fox. 

